diff --git a/rl2/cartpole/save_a_video.py b/rl2/cartpole/save_a_video.py
index 31690c29..202c136b 100644
--- a/rl2/cartpole/save_a_video.py
+++ b/rl2/cartpole/save_a_video.py
@@ -65,3 +65,5 @@ def random_search(env):
   # play a final set of episodes
   env = wrappers.Monitor(env, 'my_awesome_dir')
   print("***Final run with final weights***:", play_one_episode(env, params))
+  # close the environment
+  env.env.close()